«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

38卷

期数:

2021年05期

页码:

118-126

栏目:

出版日期:

2021-09-15

文章信息/Info

Title:

Treatment and Effect Analysis of Collapse and Roof Fall in Shallow Buried Loess Tunnel Entrance

文章编号:

1673-2049(2021)05-0118-09

作者:

杨晓华¹,肖 靖¹,辛延甫²,王安乐³,郑坤隆¹

(1. 长安大学 公路学院,陕西 西安 710064; 2. 甘肃省公路航空旅游投资集团有限公司,甘肃 兰州 730030; 3. 西安科信市政工程监理有限公司,陕西 西安 710068)

Author(s):

YANG Xiao-hua¹, XIAO Jing¹, XIN Yan-fu², WANG An-le³, ZHENG Kun-long¹

(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Gansu Provincial Highway Aviation Tourism Investment Group Co., Ltd, Lanzhou 730030, Gansu, China; 3. Xi'an Branch of Municipal Engineering Supervision Co., Ltd, Xi'an 710068, Shaanxi, China)

关键词:

黄土隧道;  塌方冒顶;  处治措施;  初期支护;  监控量测

Keywords:

loess tunnel;  collapse and roof fall;  treatment measure;  initial support;  monitoring measurement

分类号:

TU312

DOI:

10.19815/j.jace.2020.09053

文献标志码:

A

摘要:

针对十天高速公路某黄土隧道左线出口发生塌方冒顶事故的处治工程,分析隧道发生塌方冒顶的主要原因,提出采用小导管注浆加固围岩、洞内与地表共同治理的综合处治措施,并结合塌方段原设计初期支护强度不足的工程实际提出了3种初期支护方案; 利用数值分析软件FLAC 3D,对3种初期支护方案下隧道在开挖过程中围岩及支护结构的受力和变形情况进行分析。结果表明:采用工况1(I25a型钢钢架+厚30 cm喷射混凝土)初期支护体系刚度偏大,初期支护承载力存在富余,工况3(I20a型钢钢架+厚25 cm喷射混凝土)初期支护体系刚度偏小,为了保证隧道施工安全,并考虑到施工成本,应采用工况2(I22a型钢钢架+厚28cm喷射混凝土)初期支护体系; 现场监测数据表明,经过处治后隧道变形较小,最大拱顶沉降为16.4 mm,最大拱顶沉降速率为2.2 mm·d^-1,最大周边收敛为11.3 mm,最大周边收敛速率为1.6 mm·d^-1,且最大地表沉降为46.6 mm,相关变化值都在标准范围内,说明处治效果良好; 研究结果可为黄土隧道塌方冒顶的预防与处治提供借鉴。

Abstract:

Aiming at the treatment project of the collapse and roof fall accident at the left exit of a loess tunnel on the Shitian expressway, the influence factors of the collapse and roof fall in the tunnel were analyzed. Such comprehensive treatment measures as small pipe grouting for strengthening the surrounding rock, treatment inside tunnel and surface treatment were put forward, and according to the engineering practice that the initial support strength is insufficient, three initial support schemes were designed. Aiming at the three initial support schemes, the stress and deformation of the surrounding rock and supporting structure during tunnel excavation were analyzed by large numerical analysis software FLAC 3D. The results show that the initial supporting system stiffness under working condition 1(I25a steel frame + 30 cm thick shotcrete)is relatively large, and the initial supporting capacity is surplus. The initial supporting system stiffness under working condition 3(I20a steel frame + 25 cm thick shotcrete)is small. In order to ensure the safety of tunnel construction and take into account the construction cost, the initial support system under working condition 2(I22a steel frame + 28 cm thick shotcrete)should be adopted. The field measured data show that after the treatment, the tunnel deformation is small and the maximum crown settlement is 16.4 mm, the maximum crown settlement rate is 2.2 mm·d^-1, the maximum peripheral convergence is 11.3 mm, the maximum peripheral convergence rate is 1.6 mm·d^-1, and the maximum ground settlement is 46.6 mm. All the relevant change values are within the standard range, revealing that the treatment effect is good. The research results can provide a reference for prevention and treatment of collapse and roof fall of loess tunnel.

参考文献/References:

[1] 周尚国.黄土隧道的主要地质灾害类型[J].地质与勘探,2007,43(2):103-107.
ZHOU Shang-guo.Main Geology Disasters Type of Loess Tunnel[J].Geology and Exploration,2007,43(2):103-107.
[2]来弘鹏,杨晓华,林永贵.黄土公路隧道病害分析与处治措施建议[J].公路,2006(6):197-202.
LAI Hong-peng,YANG Xiao-hua,LIN Yong-gui.Disease Analysis for Highway Tunnel in Loess and Treatment Countermeasures[J].Highway,2006(6):197-202.
[3]赖金星,樊浩博,谢永利,等.旋喷桩加固黄土隧道地基固结分析[J].长安大学学报:自然科学版,2016,36(2):73-79.
LAI Jin-xing,FAN Hao-bo,XIE Yong-li,et al.Consolidation Analysis of Jet Grouting Pile Reinforcement in Loess Tunnel[J].Journal of Chang'an University:Natural Science Edition,2016,36(2):73-79.
[4]王一新,姚小平,岳 华,等.黄土地区软弱围岩隧道施工技术[J].铁道建筑,2016(6):76-79.
WANG Yi-xin,YAO Xiao-ping,YUE Hua,et al.Construction Technology of Soft Rock Tunnel in Loess Area[J].Railway Engineering,2016(6):76-79.
[5]张金柱,郝文广.黄土隧道塌方情况及病害原因分析[J].隧道建设,2007(增2):321-324.
ZHANG Jin-zhu,HAO Wen-guang.Analysis on Collapse and Damage for Tunnels in Loess Layer[J].Tunnel Construction,2007(S2):321-324.
[6]李国良.大跨黄土隧道设计与安全施工对策[J].现代隧道技术,2008,45(1):53-62.
LI Guo-liang.Design and Safety Construction Measures for Large-span Loess Tunnel[J].Modern Tunnelling Technology,2008,45(1):53-62.
[7]来弘鹏,杨晓华,林永贵.黄土公路隧道衬砌开裂分析[J].长安大学学报:自然科学版,2007,27(1):45-49.
LAI Hong-peng,YANG Xiao-hua,LIN Yong-gui.Analysis on Lining Cracks of Highway Tunnel in Loess Area[J].Journal of Chang'an University:Natural Science Edition,2007,27(1):45-49.
[8]顾伟红,王胜国.基于ISM和模糊故障树的铁路黄土隧道塌方风险分析[J].安全与环境学报,2016,16(5):31-36.
GU Wei-hong,WANG Sheng-guo.Collapse Risk Analysis for the Loess-featured Tunnels in Railway Construction Based on ISM and Fuzzy Fault Tree Method[J].Journal of Safety and Environment,2016,16(5):31-36.
[9]张 臻.客运专线黄土隧道塌方的处理措施[J].铁道标准设计,2009(增1):118-121.
ZHANG Zhen.Treatment Measures for Collapse of Loess Tunnel on Passenger Dedicated Line[J].Railway Standard Design,2009(S1):118-121.
[10]朱彦鹏,何江飞,李 军.黄土公路隧道浅埋段管棚注浆支护机理及监测分析[J].建筑科学与工程学报,2011,28(1):11-15.
ZHU Yan-peng,HE Jiang-fei,LI Jun.Support Mechanism and Monitoring Analysis of Pipe Roof Grouting for Loess Highway Tunnel in Shallow-buried Section[J].Journal of Architecture and Civil Engineering,2011,28(1):11-15.
[11]赵成江,徐 恕,金增芳.注浆法在公路饱和黄土隧道塌陷区的应用[J].筑路机械与施工机械化,2008,25(12):69-72.
ZHAO Cheng-jiang,XU Shu,JIN Zeng-fang.Application of Grouting Treatment in Subsidence Area of Saturated Loess Tunnel[J].Road Machinery and Construction Mechanization,2008,25(12):69-72.
[12]ZHANG X L,WANG M X,ZHOU B H.Influence of Factors on Collapse Risk of Loess Tunnel:A Multi-index Assessment Model[J].Journal of Engineering Design and Technology,2018,16(5):734-749.
[13]赵占厂,谢永利,杨晓华,等.黄土公路隧道围岩压力测试分析[J].现代隧道技术,2003,40(2):58-61.
ZHAO Zhan-chang,XIE Yong-li,YANG Xiao-hua,et al.Ground Pressure Measurement and Analysis for Highway Tunnels Located in Loess[J].Modern Tunnelling Technology,2003,40(2):58-61.
[14]赖金星,邱军领,牛方园,等.浅埋偏压黄土隧道塌方处治及效果分析[J].现代隧道技术,2017,54(2):194-201.
LAI Jin-xing,QIU Jun-ling,NIU Fang-yuan,et al.The Effects of Treatment of Collapses in Shallow-buried Loess Tunnels with Unsymmetrical Loading[J].Modern Tunnelling Technology,2017,54(2):194-201.
[15]徐新芳,金 成.大管棚在黄土隧道塌方处理中的应用及效果分析[J].公路,2016(12):284-290.
XU Xin-fang,JIN Cheng.Application and Effect Analysis of Large Pipe Shed in Collapse Treatment of Loess Tunnel[J].Highway,2016(12):284-290.
[16]HU S M,ZHANG D L.DEM Analysis of Failure Modes of Surrounding Rock for Large-section Loess Tunnel[J].Journal of Beijing Jiaotong University,2013,37(4):13-18.
[17]张新善,廖红建,张 立.黄土地下隧道开挖对周围土体变形的影响分析[J].岩石力学与工程学报,2004,23(增1):4333-4338.
ZHANG Xin-shan,LIAO Hong-jian,ZHANG Li.Analysis on Influence of Tunnel Excavation on Deformation of Surrounding Soil in Loessial Strata[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(S1):4333-4338.
[18]刘继国,曾亚武.FLAC^3D在深基坑开挖与支护数值模拟中的应用[J].岩土力学,2006,27(3):505-508.
LIU Ji-guo,ZENG Ya-wu.Application of FLAC^3D to Simulation of Foundation Excavation and Support[J].Rock and Soil Mechanics,2006,27(3):505-508.
[19]袁 飞,刘新荣,钟祖良.偏压黄土连拱隧道掌子面纵向间距优化研究[J].地下空间与工程学报,2011,7(2):257-262.
YUAN Fei,LIU Xin-rong,ZHONG Zu-liang.Optimization of Distance Between Excavation Faces of Unsymmetrical Loaded Loess Double-arch Tunnel[J].Chinese Journal of Underground Space and Engineering,2011,7(2):257-262.
[20]徐帮树,杨为民,王者超,等.公路隧道型钢喷射混凝土初期支护安全评价研究[J].岩土力学,2012,33(1):248-254.
XU Bang-shu,YANG Wei-min,WANG Zhe-chao,et al.Study of Initial Support Safety Evaluation About Shape Steel Reinforced Shotcrete in Highway Tunnel[J].Rock and Soil Mechanics,2012,33(1):248-254.
[21]何昌国.软弱围岩大跨隧道合理预留变形量分析及初期支护刚度优化[J].隧道建设,2018,38(增2):227-231.
HE Chang-guo.Analysis of Reasonable Reserved Deformation Amount of Large-span Tunnel in Soft Surrounding Rock and Preliminary Optimization of Initial Support Stiffness[J].Tunnel Construction,2018,38(S2):227-231.

相似文献/References:

[1]王亚琼,汪 珂,刘 彤,等.基于安全度的黄土隧道结构承载性能分析[J].建筑科学与工程学报,2015,32(04):66.
　WANG Ya-qiong,WANG Ke,LIU Tong,et al.Analysis of Structural Bearing Property of Loess Tunnel Based on Safety Degree[J].Journal of Architecture and Civil Engineering,2015,32(05):66.

备注/Memo

备注/Memo:

收稿日期:2020-09-15
基金项目:国家自然科学基金项目(42077265); 甘肃省交通运输厅科技项目(2011-10,2017-002)
作者简介:杨晓华(1961-),男,河北唐山人,教授,博士研究生导师,工学博士,E-mail:xiaohuay@126.com。

常用功能

更新日期/Last Update: 2021-09-01